Electric Door Lock Switches

[DanKS]

I have a rather weird thing happening with my electric door locks. On the driver's side and passenger side, I can get the doors to unlock with the switch, but they won't lock with the switch. HOWEVER, and this is the really weird part, when I go to the switch inside the back tailgate, it works perfectly! What could be the difference between the front switches and the back switch? I removed the whole switch assembly from the driver's door arm rest and checked the switch contacts with an ohm meter, and it is functioning just like it should. Any ideas?

 

[96Green]

My first thought would be the switch itself.

On my Sport, the rear hatch area lock switch would unlock, but lock was iffy. I took the switch apart and cleaned all the contacts, and it worked beautifully from that point on.

 

[DanKS]

No improvement

Okay, so based upon the suggestion, I replaced both the driver's side and passenger side door lock switches, and it didn't change a thing. The switch inside the back tailgate works perfectly, but the two front switches still unlock like they should but won't lock the doors. I have no idea where to look past that, and it really seems weird that only one function is affected. Could it perhaps be a fuse or other electrical issue that I haven't found? What points can I check?

 

[96Green]

Check the wiring where it passes between the door and the body. Might be a chafed or broken wire there, mayhaps?

 

[DanKS]

The harness was one of the first things I checked; everything is solid on both sides. Next?